Add ColumnCues calculations, exposed to themes via Lua function on Steps object

src/ColumnCues.cpp

@@ -0,0 +1,61 @@
+#include "global.h"
+#include "ColumnCues.h"
+#include "GameState.h"
+#include "NoteData.h"
+#include "TimingData.h"
+
+void ColumnCue::CalculateColumnCues(const NoteData &in, std::vector<ColumnCue> &out, float minDuration)
+{
+	TimingData *timing = GAMESTATE->GetProcessedTimingData();
+	NoteData::all_tracks_const_iterator curr_note = in.GetTapNoteRangeAllTracks(0, MAX_NOTE_ROW);
+	int curr_row = -1;
+
+	std::vector<ColumnCue> allColumnCues;
+	ColumnCue currentCue = ColumnCue();
+
+	while (!curr_note.IsAtEnd())
+	{
+		if(curr_note.Row() != curr_row)
+		{
+			if (currentCue.startTime != -1 )
+			{
+				allColumnCues.push_back(currentCue);
+			}
+			currentCue = ColumnCue();
+			currentCue.startTime = timing->GetElapsedTimeFromBeat(NoteRowToBeat(curr_note.Row()));
+			curr_row = curr_note.Row();
+		}
+
+		if (curr_note->type == TapNoteType_Tap || curr_note->type == TapNoteType_HoldHead)
+		{
+			currentCue.columns.push_back(ColumnCueColumn(curr_note.Track() + 1, false));
+		}
+		else if(curr_note->type == TapNoteType_Mine)
+		{
+			currentCue.columns.push_back(ColumnCueColumn(curr_note.Track() + 1, true));
+		}
+		
+		++curr_note;
+	}
+
+	// If there's a remaining columnCue from the last row, add it
+	if( currentCue.startTime != -1)
+	{
+		allColumnCues.push_back(currentCue);
+	}
+
+	float previousCueTime = 0;
+	std::vector<ColumnCue> columnCues;
+	for( ColumnCue columnCue : allColumnCues )
+	{
+		float duration = columnCue.startTime - previousCueTime;
+		if( duration > minDuration || previousCueTime == 0)
+		{
+			columnCues.push_back(ColumnCue(previousCueTime, duration, columnCue.columns));
+		}
+		previousCueTime = columnCue.startTime;
+	}
+
+	out.clear();
+	out.assign(columnCues.begin(), columnCues.end());
+}